Severity of signs (Di)

Symptoms

Total

X2

Di0

DiI

DiII

DiIII

No.

%

Ai0

No.

298

362

63

00

723

72.3

X2 = 36.68

%

41.21

50.07

8.72

00

AiI

No.

40

84

38

1

163

16.3

df = 6

P < 0.001***

%

24.53

51.53

23.32

0.62

AiII

No.

9

58

32

15

114

11.4

%

7.89

50.87

28.07

13.16

Total

No.

347

504

133

16

1000

100

%

34.7

50.4

13.3

16.0